arm64: perf: add debug patch logging framework

Provide a mechanism to track which msm perf patches
are present in a kernel. Some kernel branches do not
include all patches which causes problems trying
to debug perf issues. This framework provides a way
to keep track of which patches have been included
in a build.

Change-Id: I7d3e3022dcdec6204f8d2ba3c49fc37c674db221
Signed-off-by: Neil Leeder <nleeder@codeaurora.org>